Rename MoveMemory to MoveMemoryToMemory to fix compilation on Win32

runtime/vm/assembler_x64.h

Index: runtime/vm/assembler_x64.h
diff --git a/runtime/vm/assembler_x64.h b/runtime/vm/assembler_x64.h
index f8c8b34ee6f7ddd2ac17a737782f7c991dfddbe1..67c5a252ab67974a16b56ed7722745f9fed0df55 100644
--- a/runtime/vm/assembler_x64.h
+++ b/runtime/vm/assembler_x64.h
@@ -494,7 +494,7 @@ class Assembler : public ValueObject {
   }
 
   // Issue memory to memory move through a TMP register.
-  void MoveMemory(const Address& dst, const Address& src) {
+  void MoveMemoryToMemory(const Address& dst, const Address& src) {
     movq(TMP, src);
     movq(dst, TMP);
   }